Pump liner holding device



y 1931 J. M. SHIMER 1,860,484

PUMP LINER HOLDING DEVICE Filed June 12, 1930 2 Sheets-Sheet l INV NTORr1. QM 6134mm y 1932- J. M. SHIMER 1,860,484

PUMP LINER HOLDING DEVICE Filed Jun 12, 19:0 2 Sheets-Sheet 2 J kz/ LPatented iii/day 31, 12 32 fiTA'FES eann Parser OFFICE JOHN M. SHIMER,OF WILKINSBURG, PENNSYLVANIA, ASSIGNOR TO WILSON-SNYDER MANUFACTURING-CORPORATION, OF BRADDOCK, PENNSYLVANIA, A. CORPORATION OF PENNSYLVANIArm LINER notnme nnvron 1 1 Application 'flled June 12, 1930. Serial No.460,602.

This invention relates to the portion of a pump structure which holds inplace a liner in a pump cylinder and prevents sliding of the linerlengthwise of the cylinder. Incertain types ofpumps in which a piston isemployed, it is desirable to employ a removable liner for the bore ofthe pump chamber. As the liner becomes worn in use, a new one may besubstituted and a reboring of the pump cylinder avoided. This'linermustbe rigidly held against movement in the pump chamber for severalreasons. In the first place, the liner would conflict with the properoperation of the valves if it became displaced; and, moreover, therewould be wear between the liner and the cylinder itself. In the secondplace, the liner must also be sealed around the outside to preventleakage between the liner and the chamber. A flexible packing, such asrubber, hemp or flax, may be used; and this packing must be compressedin order to make the seal around the liner.

One object of my invention is to provide means cooperating with theliner and engaging the cylinder for holding the liner securely inposition. A further object of my invention is to so secure the liner inposition without interfering with removal of a cover plate for anopening in the cylinder, and the 'sliding of the piston out through thisopening. A more specific object of my invention is to provide a devicefor holding a liner in position in a pump cylinder, this liner beinginsertable through an opening in the cylinder and engaging, not againstthe cover plate for this openi ng, but against a seat within thecylinder. In the drawings, in

i which thereis shown for purposes of illustration, andnotas limiting myinvention, one embodiment which my invention may assume.

Fig. 1 is a side view principally in longitudinal central verticalsection of a pump. The section is shown as being all in one plane forpurposes of simplicity; although, as shown in Fig. 2, the dischargevalves are oifset from the axis of the pump cylinder; Fig. 2 is an endelevation of an opening in the cylinder of the pump, this view beingindicated by the line IL-d; of Fig. 1;

Fig. 3 is a horizontal section on, the line IIIIII of Fi 2.

Various memiers of the pump, such as the valves, the piston, etc. may bevaried in their specific structure. In the embodiment disclosed herein,for the purpose of illustrating my invention, I have shown a pump havinga cylinder 6 terminating in two end portions 7 and 8. A piston 9,actuated by a rod 10, reciprocates within a liner 11 arranged within thecylinder 6.

The liner 11 is, in the embodiment shown, cylindrical and formed at oneend only with a collar or flange 12. A counter-bore 13 having a shoulder14 is formed within the cylinder bore; and a packing 15 is arranged inthe counter-bore, so. that when the collar 12 of the liner 11 is pressedtightly into engagement with the shoulder-16, the packin 15 iscompressed to prevent leakage; chamber 18 in the end portion 8communicates with passages to and from the discharge and inlet valvesrespectively; and the shoulder 16 is formed at the entrance to thecylinder bore from chamber 18. The valve mechanisms at the two ends 7and 8 of the pump may be substantially identical;

and since the precise structure of the valves is not material to myinvention, I have merely shown a poppet valve 19 for controllingdischarge from the chamber 18. The flow of fluid into the chamber 18 isindicated in Fig. 2 by the arrow 31, and the'flow of fluid from thechamber 18 to and past the valve 19 is indicated in Fig. 2 by the arrow32.

My improved means for positioning the liner includes a device 20. Thisdevice may take various forms, but as shown in Fig. 2, is substantiallyring shaped. On opposite sides of the ring 20 are formed projectingportions 21. An opening 23 is formed in the end portion 8 of thecylinder 6, this opening being slightly larger than the periphery of theflange or collar 12 on the liner 11, so that the liner may be removedthrough the opening 23. The projecting portions 21 extend further fromthe axis of the ring 20 than the length of a radius of the opening 23.Within the end portion 8 and facing inward ly toward the chamber 18 areformed seats 24 7 (see Fig. 3) upon which the projections 21 of the ring20 may seat. Inasmuch as the seating surfaces 24 face inwardly the ring20, when seated, resists pressure tending to move it out of thecylinder. A plurality (herein 4) of adjustable spacing elements, such asthreaded bolts or screws, are mounted in the ring 20. As will be notedfrom Fig. 2, the dianreter of the opening in the ring 20 is slightlylarger than the diameter of the bore of the liner'll. The ends of thebolts or screws 25, therefore,.engage the flange or collar 12; and byturning the elements 25 the flange 12 may be pressed tight against theshoulder 16.

The opening 23 is larger than the outer diameter of the major portion ofthe ring 20. In the embodiment disclosed herein, the opening 23 iscylindrical although enlargements thereof at one or more oints might beprovided for the purpose of receiving or permitting the passage ofelements of the pump. Such enlargements would be arranged so as to beout of alignment with the projections 21. when the ring 21 engages theseats 24. \Vith the cylindrical'form of opening 23 shown, theprojections 21 prevent removal of the ring unless the same .be tilted sothat one of the projecting portions 21 may precede the other to backthescrews 25 on one side of the ring slightly away from the liner and towithdraw entirely the other elements 25 on the other side of the ring,so that the inner ends of these elements do not interfere with thetilting of the ring 20. The cylindrical opening 23 is the preferred,forms for certain installations, but in certain cases where it isconvenient to form the opening 23 other than cylindrical, I may causethe same to deviate outwardly from the true cylindrical form as abovementioned. When the ring 20 is to be withdrawn, it is rotated until theprojectng portions 21 register with the enlarged portions of the opening23, when the ring 20 may be moved directly outwardly.

' As the opening 23 is in any case considerably larger than the bore ofthe liner 11, it is clear that the piston 9 may be removed from the pumpwithout even loosening the elements 25. It is clearly apparent from Fig.2 that the ring 20 will not interfere with such removal of the piston 9.To cover the openin 23 during normal operation of the pump, I

' provide a suitable cover member or cylinder ead 27, held in positionby screws 28 engaging the end portion 8. A usual packing 29.

prevents leakage between the cylinder end portion 8 and the cover 27, orcylinder head.

It will be obvious from the above description that I have provided animproved means for positioning the liner 11 and preventing sliding ordisplacement thereof lengthwise of the cylinder 6. It will furthermorebe ap parent that I have accomplished this purpose without making thepositioning means dependent upon the cylinder head 27 in any manner. Thecylinder head 27 may be freely removed at any time without getting anyof the elements 25 out of adjustment. It is possible, moreover, toremove the piston 9 without disarranging the ring 20 orany of theelements 25. The free flow of the li uid or fluid which is being pumpedmay take p ace to and from the bore of the pump, (as shown by the arrowsin Fig.2) since the elements 25 interfere none at all with the movementof the fluid from the inlet valve (not shown) to the pump bore (seearrow 31 in Fig. 2), and from the pump bore to the discharge valve 19(see arrow 32in Fig. 2). A further advantage of my improved spacing orpositioning means is that it need not be formed as an integral part of a'pump, but may be removed through the opening 23.

While I have illustrated and described one specific form of myinvention, it will be understood that the invention is not resticted tothe particular construction and arran ement shown, but may be variouslymodi ed within the contemplation of the invention and under the scope ofthe following claims.

I claim:

'1. In combination, a pump cylinder having an opening and an inwardlfyfacing seat adjacent said opening, a liner or the pump cylinder, andspacing means for retaining the liner in position comprising an annularelement engaging said seat, said spacing means including the annularelement being removable through said opening.

2. In combination, a pump cylinder having an opening and an inwardlyfacing seat adjacent saidopening, a liner for the cylinder, and spacingmeans for retaining the liner in position comprising an annular elementengaging said seat and an adjusting ele ment engaging the liner, saidspacing means being removable through the opening in the cylinder.

3. In combination, a pump cylinder having an ofpening in one endthereof, a piston, a liner or the cylinder, and means seating within thecylinder for positioning the liner,-

said positioning means having an opening alined with the opening in thecylinder, both openings being of cross section permltting the piston topass through.

4. In combination, a pump cylinder havin an opening in one end thereofand an inwar ly facing seat adjacent said opening, a piston, a liner forthe cylinder, and spacing means engaging the seat and the liner, saispacing means having an o ening alined with the axis of the liner and 0cross section permitting the piston to pass through.

5. In combination, a pump cylinder having an end opening and an inwardlyfacing seat adjacent said opening, a liner for the cylin- III der, andmeans for retaining the liner in position, said means comprising anannular element engagin said seat, said annular element being remova lethrough the end opening in the cylinder, but being of larger cross sec-.tion than the opening when arranged in 0perative position transverselyof the cylinder so as to be held against movement directlylongitudinally of the cylinder.

6. In combination, a ump cylinder having an opening, a liner or thecylinder, and adjustable means for positioning the liner, saidpositioning means comprising an annular element engaging said seat andremovable through the opening in the cylinder.

7 In combination, a pum cylinder having an opening, and an inward yfacing seat adjacent said opening, a liner for the cylinder, a ringinsertable through the opening and engaging the seat, and adjustablespacing means carried by the ring for engaging the liner.

8. In combination, a pump cylinder having an openin and an inwardlyfacing seat adjacent sai opening, a liner for the cylinder, a ringformed with external eccentric portions, said ring being insertiblethrough the opening and engaging the seat, and adjustable spacing meanscarried by the ring for engaging the liner.

9. n, combination, a pump cylinder, a piston, a liner for the c linder,saidcylinder having an opening alined with the axis of the liner and ofcross section permitting the pistonto pass through, said cylinder havingalso an inwardly facing seat adjacent said opening, and spacing meansengaging said seat and liner, said spacing'means having an openingalined with the axis of the liner and of cross section'permitting thepiston to pass throu h.

10. n combination, a pump cylinder, a piston, a liner for the cylinder,said cylinder having an opening alined with the axis of the der whenmoved out of alinement with said seat.

13. In combination, a sump cylinder having an opening in one en thereofand an inwardly facing seat adjacent said opening, a

liner for the pump cylinder, and spacing means for retaining the linerin position comprising a unitary seat-engaging member surrounding saidopening, said spacing means including the unitary seat-engaging memberbeing removable through said end opening.

14.. In combination, a pump cylinder having an end opening and aninwardly facing seat adjacent said opening, a liner for the cylinder,and means for retaining the liner in position, said means comprising aunitary seat-engaging member surrounding said opening and adjustingmeans carried by said member for engaging the liner, said member beingof larger cross section than the opening when arranged in operativeposition transversel of the cylinder, said retaining means inclu ingsaid unitary seat-engaging member being removable through the endopening in the cylinder.

15. In combination, a pump cylinder having an opening in one end thereofand an inwardly facing seat adjacent said opening, a, liner for the pumpcylinder, and spacing means comprismg mechanism engaging the 9 liner forretaining the liner in position and a single unitary member engagingsaid seat and carrying said retaining mechanism, said spacing meansincluding said unitary seatengaging member being removable through saidopening.

In testimony whereof I have hereunto set m hand..

y JOHN M. SHIMER.

- liner and an inwardly facing'seat adjacent said opening, and spacingmeans for retaining the liner in position comprising an annular elementengaging said seat, said spacing means including the annular elementbeing removable through the opening in the cylinder.

11. in combination, a pump cylinder having an opening in one endthereof, a piston, a liner for the cylinder, and means seating upon aseat within the cylinder for position:

ing the liner, said positionlng means compris- I ing an annular elementseating upon said seat within the cylinder and removable through theopening in the cylinder when.

moved out of alinement with said seat.

12. In combination, a pump cylinder having an opening, a piston, a linerfor the cylinder, and means seating upon a seat within the cylinder forpositioning the liner, said positioning means comprising an annularelement seating upon said seat within the cylinder and removable throughtheopening in the cylin-

